--- old/src/java.base/share/classes/sun/net/www/protocol/http/NegotiateAuthentication.java	2019-08-27 17:29:34.354324386 -0700
+++ new/src/java.base/share/classes/sun/net/www/protocol/http/NegotiateAuthentication.java	2019-08-27 17:29:34.190324386 -0700
@@ -45,6 +45,7 @@
 
 class NegotiateAuthentication extends AuthenticationInfo {
 
+    @java.io.Serial
     private static final long serialVersionUID = 100L;
     private static final PlatformLogger logger = HttpURLConnection.getHttpLogger();